.gray {
  float: left;
  width: 100%;
  height: 10px;
  background: #f3f6f9;
}

.drop {
  display: inline-block;
  width: 100%;
  text-align: center;
  color: #cccccc;
  font-size: 14px;
  margin-top: 30px;
  margin-bottom: 30px;
}

.vod-course-item {
  width: 100%;
  height: auto;
  float: left;
  box-sizing: border-box;
  padding: 15px;
}
